Fluorescent indicator.



PATENTBD NOV: 1904.

ESMUND A. T. ABBEY & F. J.

FLUORESGENT IHDIGATOR.

APPLIGATIOH FILED AUG 1903.

M) MODEL.

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ilnirnn STATES:

Patented November 29, 1904.

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ALFRED T. ABBEY AND FREDERICK J. ESMOND, OF VICTORIA, CANADA.

FLUORESCENT INDICATOR- SPECIFICATION forming part of Letters Patent No.776,211, dated November 29, 1904:.

Application iiled August 28, 1903. Serial No. 171,084.. (No model.)

To all whom, it may concern.-

Be it known that we, ALFRED T. ABBEY and FREDERICK J. EsMoND, citizensof the Dominion of Canada, residing at the city of Victoria,

in the Province of British Columbia, Canada,

have invented a new and useful Improvement in Fluorescent Indicators, ofwhich the following is a specification.

Our invention relates to an improved means for indicating in the darkthe position of an electric switch-box, drop-key, or incandescent lamp.

The-inconvenience has long been felt of having to feel round in a darkroom to find any of these before being able to turn on thelight, and ithas been largely to overcome this diliiculty that lamps have beenintroduced having a secondary filament of low candle-power.

The object of this invention is to provide a band or ring of fluorescentor light-emitting material and removably secure the same to the articleto be indicated by a fastening that will readily adapt itself to slightvariations of size in the part to which it may be desired. to attach itand that can be removed without any diificulty when occasion requires.The means by which these objects are effected are fully described in thefollowing specification and illustrated in the drawings which accompanyand form a part of this application.

Figure 1 is a perspective view of the device detached; Fig. 2, a plan ofthe same, showing by dotted lines the enlargement of the band duringremoval or attachment; Fig. 3, a perspective view showing theapplication to an incandescent lamp, and Fig. 4, a perspective viewshowing the application of a modified form to the base of a switch-box.

The indicator consists of a ring 2, of celluloid or any material suitedto the reception and retention of fluorescent properties, whether from-phosphorescent paint or however attained,

and the ring may be provided with a scalloped edge, as 3, that itsemitted light may have a characteristic feature that will enable it tobe readily identified, to carry out which the form of the scallop may bevaried.

The ring 2 is secured to a resilient clasp 4, the ends 5 of which passor overlap one another and are outwardly bent, as 6, to form opposingfinger'engaging members,which being pressed together between linger andthumb enlarge the ring, as indicated by dot-and-dash lines in Fig. 2,and enable it to be passed onto the base of a switch-box. socket of alamp, or whatever it may be desired to attach the indicator to.

When the device is applied to a switch-box, bell push, or similar wallattachment, the modified form illustrated in Fig. A is to be preferred.In this construction the fiuorescent member is in the form of a flangeor ring, so as to lie against the wall and show its glow to the front.

WVhen applied to a lamp-socket, a portion 7 is removed from theupperedge of the ring to enable it to clear the cut-oil key 11 of the lamp.

It will be noticed that the indicator can be applied to any standardlamp or electric fixture and readily transferred from one to another, asoccasion may require.

We are aware that phosphorescent indicators have been previously used onsuch articles as matclrboxes, &c., but believe we have been the first toapply such in the manner proposed for the purpose specified.

l/Ve declare, therefore, that what we claim as new, and desire to beprotected in by Letters Patent, is

1. An indicator of the class described comprising a resilient claspadapted to encircle the socket of a lamp or similar article, the ends ofthe clasp being overlapped and outwardly turned to form opposing fingerand thumb engagements, and a ring of fluorescent material secured to theclasp.

2. An indicator of the character described, comprising a band ofresilient material adapted to be bent into a circle to fit around thesocket of the lamp or other similar article, and a second resilientmember bent to a circular shape, said second resilient member beingattached to the inner edge of the first resilient member and having itsends extended beyond the adjacent edges of the first resilient memberand crossing each other and terminating in finger-pieces that project atright angles with respect to the resilient member, for the purposesspecified.

3. An indicator of the character described, comprising a band of aresilient fluorescent material having a serrated upper edge and acut-away portion, said band adapted to be bent into a circular form tofit around the socket of a lamp or other similar article with thecut-away portion receiving the socket- -key, a spring-wire member bentinto a circular shape and secured to the lower edge of the resilientband, and having its ends eX- tended beyond the adjacent edges of theresilient band and crossing each other and terminating in finger-piecesprojecting radially with respect to the axial line of the resilient bandwhen bent into shape for the purposes 5

